Gnocchi Resources updation with new metric fails with 406 response if the Accept header is set to application/json through REST api

[Arjun G]

Gnocchi Resources updation with new metric fails with 406 response if the Accept header is set to application/json through REST api.

While testing through curl command also, we got 206 error.

With out header "Accept: application/json"
curl -g -i -H 'X-Auth-Token: gAAAAABazzcY90bC8OGKedYwV0caZ02BYZC-x2_bLTgCsfeteiElMpxkgtMKbh7UTSV4F5YxqwghISgUTc1ZbOxDfmO6yR1r0XkeaMZNwjAxoAGHh9w25rxBBnhg_WYh3U8wBHUNIuHxo2CjM2AMkhulh4s-PcOJUXhvkbA1aKoKUM5Vq-PWnKHucpoUpTrHF840vnDsdFtN' -X POST http://ubuntu16:8041/v1/resource/instance/11dbeeae-40d4-43a2-81d2-aae37541188f/metric -H "Content-Type: application/json" -H "HTTP/1.1" -d '{"cpu.util1":{"archive_policy_name":"low"}}'
HTTP/1.1 204 No Content
Date: Thu, 12 Apr 2018 10:44:19 GMT
Server: Apache/2.4.18 (Ubuntu)

With header "Accept: application/json"
curl -g -i -H 'X-Auth-Token: gAAAAABazzcY90bC8OGKedYwV0caZ02BYZC-x2_bLTgCsfeteiElMpxkgtMKbh7UTSV4F5YxqwghISgUTc1ZbOxDfmO6yR1r0XkeaMZNwjAxoAGHh9w25rxBBnhg_WYh3U8wBHUNIuHxo2CjM2AMkhulh4s-PcOJUXhvkbA1aKoKUM5Vq-PWnKHucpoUpTrHF840vnDsdFtN' -X POST http://ubuntu16:8041/v1/resource/instance/11dbeeae-40d4-43a2-81d2-aae37541188f/metric -H "Content-Type: application/json" -H "Accept: application/json" -H "HTTP/1.1" -d '{"cpu.util":{"archive_policy_name":"low"}}'
HTTP/1.1 406 Not Acceptable
Date: Thu, 12 Apr 2018 11:33:43 GMT
Server: Apache/2.4.18 (Ubuntu)
Content-Length: 61
Content-Type: application/json

Presently using Gnocchi 3.3.1 version. Please let us know is this issue can be fixed & already working in some newer version builds.